linux-kernel - [PATCH] tracing: correct the nr_page calculation in remote tlb shootdown

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Message-Id: <1424477615-3550-1-git-send-email-zi.yan@cs.rutgers.edu>
Date:	Fri, 20 Feb 2015 19:13:35 -0500
From:	Zi Yan <zi.yan@...rutgers.edu>
To:	linux-kernel@...r.kernel.org
Cc:	Zi Yan <zi.yan@...rutgers.edu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Jeremiah Mahler <jmmahler@...il.com>
Subject: [PATCH]     tracing: correct the nr_page calculation in remote tlb shootdown

    Add parenthesis to make the calculation correct.

Signed-off-by: Zi Yan <zi.yan@...rutgers.edu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Rik van Riel <riel@...hat.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Jeremiah Mahler <jmmahler@...il.com>
Cc: linux-kernel@...r.kernel.org
---
 arch/x86/mm/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 3250f23..90b924a 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -117,7 +117,7 @@ static void flush_tlb_func(void *info)
 		} else {
 			unsigned long addr;
 			unsigned long nr_pages =
-				f->flush_end - f->flush_start / PAGE_SIZE;
+				(f->flush_end - f->flush_start) / PAGE_SIZE;
 			addr = f->flush_start;
 			while (addr < f->flush_end) {
 				__flush_tlb_single(addr);
-- 
2.1.4
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